Rockwell-automation 1757-FFLD Linking Device Configuration Manual Manual do Utilizador descarregar pdf (Página 147)

Publication 1757-PM002A-EN-E - June 2006

Glossary 5

Transducer Block

(TB)

Decouples Function Blocks (FBs) from the local Input/Output (I/O) functions required to

read sensors and command output hardware. Transducer Blocks (TBs) contain

information such as calibration date and sensor type. There is usually one TB channel

for each input or output of a Function Block (FB).

Transmitter An active fieldbus device containing circuitry, which applies a digital signal on the bus.

Trunk The main communication highway between devices on an H1 fieldbus network. The

Trunk acts as a source of main supply to Spurs on the network.

Virtual

Communication

Relationship (VCR)

Configured application layer channels that provide for the transfer of data between

applications. FOUNDATION fieldbus describes three types of VCRs: Publisher/

Subscriber, client/Server, and Source/Sink.

Term Definition

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Rockwell-automation 1757-FFLD Linking Device Configuration Manual Manual do Utilizador Página 147